Results
Q1. In a gas turbine engine:
Correct answer is – thrust is maximum and ram pressure at minimum at the start of the take-off run
Q2. In a high bypass engine whose fan max rpm is 20000 rpm, when turning at 5000 rpm will develop approx.
Correct answer is – 5% take-off thrust
Q3. With an increase in altitude which of the following statements are correct for a jet aircraft with constant engine speed for a fixed throttle setting? 1. Temperature and pressure reduce with a resulting drop in thrust 2. Fuel consumption will increase 3. Fuel consumption will decrease 4. Specific fuel consumption will increase 5. Specific fuel consumption will decrease 6. Specific fuel consumption stays relatively the same 7. Temperature and pressure will reduce, resulting in an increase in thrust
Correct answer is – 1, 3, 6
Q4. The maximum thrust that a jet engine can develop will be:
Correct answer is – max static thrust
Q5. As temperature ____ air density ____ and the mass of air for given engine speed ____ therefore thrust ____ . To maintain the compressor speed however ____ fuel must be added or the compressor will ____.
Correct answer is – decreases, increases, increases, increases, more, slow down
Q6. From a standing start with an increase in forward speed jet thrust will:
Correct answer is – decrease then recover but will never achieve its initial setting
Q7. On a turboprop aircraft with a 14 stage axial flow compressor while climbing it will experience:
Correct answer is – decrease shaft horsepower, decrease jet thrust, decrease fuel consumption
Q8. On a turboprop aircraft with a 14 stage axial flow compressor while increasing forward speed, it will experience:
Correct answer is – increase shaft horsepower, decrease jet thrust
Q9. On a part throttled engine, take-off thrust would be achieved:
Correct answer is – at less than full throttle position
